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| Content Provider | IET Digital Library |
|---|---|
| Author | Kou, Leilei Xiang, Maosheng Wang, Xiaoqing |
| Abstract | Circular synthetic aperture radar (SAR) imaging on the geosynchronous orbit has many potential advantages, such as high-resolution three-dimensional (3D) imaging and continuous surveillance of broad area. The mission considered is an L-band geosynchronous circular SAR (GEOCSAR) with full aperture measurement. Since the integration time of GEOCSAR can be as long as 24 h, the orbit altitude is about 36 000 km and the coverage may reach 1/3 of the Earth's surface. The spatial and temporal variation of the ionosphere may impose significant effects on 3D imaging performance of GEOCSAR. The effects of ionospheric spatial variation including vertical and horizontal structure, the ionospheric turbulence and the ionospheric temporal variation are discussed. The analysis shows that the temporal variation of the ionospheric electron content during the synthetic aperture and the ionospheric turbulence may severely affect the GEOCSAR focusing performance on the XY plane. The vertical and horizontal structure of the ionosphere will cause image shift, and the dispersion effect is negligible. |
| Starting Page | 875 |
| Ending Page | 884 |
| Page Count | 10 |
| ISSN | 17518784 |
| Volume Number | 8 |
| e-ISSN | 17518792 |
| Issue Number | Issue 8, Oct (2014) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-rsn/8/8 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-rsn.2013.0296 |
| Journal | IET Radar, Sonar & Navigation |
| Publisher Date | 2014-03-12 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | 3D Imaging Performance GEOCSAR Image Shift Ionospheric Disturbances Ionospheric Electron Content Ionospheric Spatial Variation Ionospheric Temporal Variation Ionospheric Turbulence L-band Geosynchronous Circular Synthetic Aperture Radar Radar Equipment Radar Imaging SAR Synthetic Aperture Radar System And Application Three-dimensional Imaging |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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